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UC2842AJ from TI,Texas Instruments

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UC2842AJ

Manufacturer: TI

Current Mode PWM Controller

Partnumber Manufacturer Quantity Availability
UC2842AJ TI 5 In Stock

Description and Introduction

Current Mode PWM Controller The UC2842AJ is a current-mode PWM controller manufactured by Texas Instruments (TI). Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Input Voltage (VIN):** Up to 30V (operating range)  
- **Output Drive Current:** ±1A (peak)  
- **Switching Frequency:** Up to 500kHz  
- **Duty Cycle Range:** 0% to 100%  
- **Error Amplifier Bandwidth:** 1MHz  
- **Reference Voltage (VREF):** 5V ±1%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Pin PDIP (Plastic Dual In-Line Package)  

### **Descriptions:**  
- The UC2842AJ is designed for offline and DC-DC converter applications.  
- It provides precise duty cycle control with current-mode operation for improved loop response.  
- Includes an undervoltage lockout (UVLO) feature with hysteresis for reliable startup.  
- Suitable for flyback, forward, and boost converter designs.  

### **Features:**  
- **Current-Mode Control:** Enhances transient response and simplifies loop compensation.  
- **Automatic Feed-Forward Compensation:** Improves line regulation.  
- **Under-Voltage Lockout (UVLO):** Ensures proper startup and shutdown.  
- **Cycle-by-Cycle Current Limiting:** Protects against overcurrent conditions.  
- **Internal Trimmed Bandgap Reference:** Provides stable 5V reference.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Low Startup Current:** Typically 0.5mA for efficient operation.  

This information is based on TI's official datasheet for the UC2842AJ. For detailed application notes or design considerations, refer to the manufacturer's documentation.

Application Scenarios & Design Considerations

Current Mode PWM Controller

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